How would you feel if you had to give up your smartphone for nine days？In 2014，and again in 2018，philosophy professor and writer Ron Srigley offered extra credit to those who would give him custody（保管）of their phones for nine days and write about the experience.
   "What they wrote was remarkable，and remarkably consistent，" Srigley wrote.At first，all the students felt disoriented and frustrated.（1）

F

F

.
   They paid more attention to the people around them.
   For one thing，they observed，for the first time，how much other people were using their phones，for example in the middle of a face-to-face conversation.
   "（2）

A

A

，but yet again，I find myself guilty of this sometimes because it is the norm（常態(tài)），" one student wrote.Another noted that as she walked by other people，they tended to pull out their phones "right before I could gain eye contact with them".
   They had better face-to-face conversations with family.
   Two of the students were accustomed to using their phones to constantly message with their family members throughout the day，and they felt deprived of this contact.But when the students spent in-person time with their parents，（3）

G

G

.
   They were more afraid.
   Some of the students reported that they were fearful of having no phones，wondering what they would do if they were kidnapped or attacked or had to call an ambulance for some reason.Srigley noted，"What's revealing is that these students perceived the world to be a very dangerous place.（4）

D

D

.The city in which these students lived has one of the lowest crime rates in the world and almost no violent crime of any kind，yet they experienced a pervasive，undefined fear."
   "Without cellphones，life would be simple and real，（5）

E

E

. " That's probably truer for all of us than we would like to admit.

A.This action is very rude and unacceptable
B.their conversations were constantly interrupted
C.but we got things done quicker without the cell
D.Cellphones were seen as necessary to combat that danger
E.but we may not be able to cope with the world and our society
F.But after a few days without smartphones，they began to notice other things too
G.the parents were mostly pleased because they suddenly had their children's undivided attention